package com.test;

import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;

public class MaxTemperatureDriver extends Configured implements Tool{

    @Override
    public int run(String[] args) throws Exception {

        if (args.length != 2) {
            System.err.printf("Usage: %s [generic options] <input> <output>\n",
                    getClass().getSimpleName());
            ToolRunner.printGenericCommandUsage(System.err);
            return -1;
        }
        Job job = new Job(getConf(), "Max temperature");
        job.setJarByClass(getClass());
        FileInputFormat.addInputPath(job, new Path(args[0]));
        FileOutputFormat.setOutputPath(job, new Path(args[1]));
        job.setMapperClass(MaxTemperatureMapper.class);
        job.setCombinerClass(MaxTemperatureReducer.class);
        job.setReducerClass(MaxTemperatureReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);
        return job.waitForCompletion(true) ? 0 : 1;

    }
    
    public static void main(String[] args) throws Exception{
        
        int exitCode = ToolRunner.run(new MaxTemperatureDriver(), new String[]{"input/1.txt", "output"});
        System.exit(exitCode);
        
    }

}
